#!/bin/sh
#
#  Shell Script to write index to each frame
#
#  Creator: lancefu (Chu Lan Fu)
#  Email:   lancefu@cs.ubc.ca
#

if [ $# -ne 1 ]
then
    echo "Usage: $0  mdaFileName"
    echo "       Convert mda to image, resize it, and put index on each frame"
    echo "       eg. im_annotation input.mda"
    exit 1
fi

# Parameters:
mdaFileName=$1

# Run mda-toimage to get image from mda file
mda-toimage PNG:- < $mdaFileName > temp.png

# Getting demension from mda-info
d=`mda-info -d < $mdaFileName`
#width=`echo $d | cut -d "," -f 1`
#height=`echo $d | cut -d "," -f 2`
nframes=`echo $d | cut -d "," -f 3`
f=`expr $nframes + 1`

# Resize image
# Change the values of resizeWidth & resizeHeightOfSingleFrame if you wish to resize to different size
resizedWidth=320
resizedHeightOfSingleFrame=180

resizeHeight=`expr $resizedHeightOfSingleFrame \* $nframes`
mogrify -resize $resizedWidth\x$resizedHeight temp.png

# Relative text position
rx=`expr $resizedWidth / 10`
ry=`expr $resizedHeightOfSingleFrame / 8`

# Initialize absolute text position
posX=`expr $resizedWidth - $rx`
posY=$ry

# Index/Counter
i=1

# Loop to draw index on each frame
while [ $i -lt $f ]
do

    if [ $i -eq 1 ]
    then
        convert temp.png -font Times-Roman -pointsize 20  -stroke red  -strokewidth 1 \
                -draw "translate $posX,$posY fill red  text -1,-1 '$i'" indexedImage.jpg
    else
        convert indexedImage.jpg -font Times-Roman -pointsize 20  -stroke red  -strokewidth 1 \
                -draw "translate $posX,$posY fill red  text -1,-1 '$i'" indexedImage.jpg
    fi

    # Update offset
    posY=`expr $resizedHeightOfSingleFrame \* $i`
    posY=`expr $posY + $ry`
    i=`expr $i + 1`

done